Wrecker and similar hoisting apparatus



E. w. HOLMES ET AL WRECKER AND SIMILAR HOISTING APPARATUS Aug. 16,1949.

l5 Sheets-Sheet 2 Filed Dec. 28, 1944 wnulnl E. w. HoLMEs ETAL 2,479,009

WRCKER AND SIMILAR HOISTING APPARATUS Aug. 16,1949.

15 shaw-sheep s Filed Dec. 28, 1944 Aug. 16, 1949. E. w. HOLMES ETALWRECKER AND SIMILAR HOISTING APPARATUS 15 Sheets-Sheet 4 Filed Dec. 28,1944 nwwllmvnillhunu Aug. 16, 1949. E. w. HOLMES ETAL 2,479,009

WRECKER AND SIMILAR HOISTING APPARATUS 15 Sheets-Sheet 5 Aug. 16, 1949.E. w. HOLMES ET A1.

WRECKER AND SIMILAR HOISTING APPARATUS l'sheets-sheet 'e Filed Dec. ze,1944 Aug. 16, 1949. E. w. HOLMES ETAL 2,479,009

WRECKER AND SIMILAR HOISTING APPARATUS 15 Sheets-Sheet 7 Filed Dec. 28,1944 if si III/@Zwagwww# Erf; .si Wolf/zag; Jig.

Aug. 16, 1949. E. w. HOLMES ETAL 2,479,009

WRECKER AND SIMILAR HOISTING APPARATUS I Filed Dec. 28, 1944 15sheets-sheet s Aug. 16, 1949. V E. w. HOLMES ETAL 2,479,009

WRECKER lAND SIMILAR HOISTING APPARATUS Filed Dec. 28, 1944 l 15sheds-sheet 9 ,afA

gimme/whew A118 16, 1949. E. w. HOLMES ETAL 2,479,009

WRECKER AND SIMILAR HOISTING APPARATUS Filed Dec. 28, 1944 A 15sheets-sheet w 97x66? @wma Zwesz ZIJ/0527265, JF',

E. w. HOLMES ETAL 2,479,009

NRECKER AND SIMILAR HOISTING APPARATUS Aug. 1e, 1949.

l5 Sheets-Sheet 11 Filed Dec. 28, 1944 si W/almes Aug. l6,` 1949. Ex w'.HOLMES ETAL 2,479,009

WRECKER AND SIMILAR HOISTING APPARATUS Filed Dec. 28, 1944 15Sheets-Sheet 12 l .f .l

I I '3/ f4 a I 1 J g l j] i 152 Aug. 16 1949. E. w. HOLMES ET AL2,479,009

WRECKER AND SIMILAR HOISTING APPARATUS Filed Dec. 28, 1944 15Sheets-Sheet 13 Aug. 16, 1949. E. w. HOLMES ETAL 2,479,009

WRECKER AND SIMLAR HOISTING APPARATUS Filed Dec. 28, 1944 15sheets-sheet 14 Y Zraes ,3f/22227446.3165

Aug. 16, 1949. E. w. HOLMES ETAI. i 2,479,009

WRECKER AND SIMILAR HOISTING APPARATUS 15 Sheets-Sheet 15 Filed Dec. 28.1944 @M Mflu@ GMM/waag S Patented Aug. 16, 1949 WRECKER' AND SIMILARnoIs'rmG APPARATUS Ernest W. Holmes and Ernest W. Holmes, Jr.,

Chattanooga, Tenn.; S. Bartow Strang, administrator of said Ernest W.Holmes, deceased,'as

'signers to Ernest Holmes Company, a corporation of Tennessee vApplication nemlier as, 1944, serial No. 570,184

The present invention relates to improvements in wreckers and similarhoisting apparatus; and more especially apparatus o f the .mobile typeadapted to be mounted on a truck or othersuit-f able vehicle, andcomprising means for handling disabled motor vehicles, and forperforming hoisting, pulling, towing and other similar operations. f n

The primary object of the invention is to provide a novel and improvedwrecker or hoisting apparatus whichis capable of handling heavier loadsthan heretofore in apparatus of this class in the performance of variousoperations, and which may be controlled Ysafely and with facility.

A more particular object of the invention is to provide a wreckerembodying a ypair of booms provided with cables for raising and loweringthem, service cables for `the booms, and novel power means for raisingand lowering the booms, swinging the booms to various angles and foroperating the service cables.

Another object is to `provide a power unit in which means for raisingand lowering the booms, swinging the booms, and-operating the servicecables are centralized.

Another object is to provide centralized control means for the powermeans whereby the operations of raising and lowering the booms, swingingthe booms, and pulling or paying out the service cables may becontrolled with safety and facility by an operator stationed at a singleconvenient position.

Another object is to provide novel control means for a wrecker of thedouble boom type, whereby the booms may be either simultaneously Aorindividually raised or lowered, or swung laterally in eitherdirection-and the service cables may be wound or unwound eithersimultaneously or individually.

Another object is to provide means for automatically stopping thelateral swing of each -boom when it has been brought into apredetermined position by the operation of its power means.

VAnother object is to provide an overdrive for each service cablewhereby it may be w1ound rapidly while slack or the load thereon isrelatively light, after which increased power may be applied to thewinding of such cable for the lifting or pullingof increasedror heavierloads.

Another object is to provide an improved boom structure embodying atelescopic or extensible member which may be adjusted to increase orreduce the eective length ori.V the boom, and

20 Claims. (Cl. 214-86) 2 thereby increase the range ofv operation ofthe boom. Another object is to provide a boom havinga member which maybe extended to increase the effective length of the boom, or retractedto reduce the length lof the boom under the control of power derivedfrom the wrecker. Y

Another object is to provide a telescopic or variable length boom havingmeanswhereby the operation of increasing the length of the boomautomatically raises the boom, and the operation of shortening thelength of the boom automatically lowers it.` Y A Another object is toprovide novel means for preventing unwinding of the service and boomcables when the winding means therefor are disconnected -from the powermeans. Y

e Another object is to provide rmeans whereby the service cables may beemployed for pulling from the rear of the truck, either endwise or fromeither side thereof. ff,

Another object is to provide novel means for tightening Outrigger legsat the sides" of the wrecker whereby the wrecker is braced or steadiedrmly on the ground, and is thus able' to lift heavy loads withoutshifting .its position or tilting, especially while lifting heavy loadsata side of the wrecker. A

Another object is to provide a wrecker of the double boom type havingmeans for automatically couplingV their outer ends when brought togetherlfor conjoint operation, or Yforsteadying them while the wrecker is intransit, the coupling means being readily releasable to uncouple thebooms .for independent operation.`

To these and other ends, the inventionyconsists in certain improvementsand combinations and arrangements of parts, all as will be hereinaftermore fully described, the features of novelty being pointedvout moreparticularly in the claims at the end of this specification. Y

In the accompanying drawings:

Figure 1 is a side elevation of a wrecker constructed in accordance withthe present invention.

Figure 2 is a reark elevation of the wrecker, showing the booms swunglaterally from the respective sides thereof.Y

Figure 3 is a detail view, on an enlargedA scale,

Aof the coupling for the upper ends of the booms.

Figure 4 is a detail section taken on the line 4-4 in Figure 3. 4

Figure 5 is an elevation, partly in vertical section, and -on anenlarged scale, of the'lower end of one of the booms and iismast.Av

Figure 6 is a detail View of the automatic controls for the boomswinging means.

Figure 7 is a top plan, partly in section, of the driving means for theWinding .means for the Iboom raising andlowering cable and the servicecable for the boom at one side of the wrecker.

Figure 8 is a rear elevation of the structure Y and overdrive for one ofthe service cable windre 13 is a se'c'ti taken ori the line ISLN.

indrvig-r12.. l p

'Figiire i4. isa detail 'section taken olii the line [4f-.I4 in Fig. 13.x r'igur'eis isla 'dtail View, iii section, of the detent for holdingthe r'iair'i and overdrive for the cable winding drimrin neutralposition. .Figilre .16 is a seetio'ri taken en the une it-lt in,F`ig.12.,v

Figure 17 A,is a detail view of the friction drive forthe service cableVwinding drum. I

,Figure 18 is a detail section vthrough the winding drums for theservice yand boom supporting cables, showing the mountings for thesedrums and the worm driveA for the boom supportingcable.

Figure 19 is a side elevation of the main transmission for driving theWinding drums for the service cables and the boom supporting cables, andfor swinging the booms.

Figure 20 is a central vertical section through the main transmission,taken on the` line 2% 3-7-20 irl-Fig. 19.

Figure 21 is an end elevation of the main trans-*- mission as Vviewedfrom the rleft in Fig. 19;

Figuren is 'a ii'cri'zontai section through the lintin transmission;taken on the line V22422 Vin Fig. 2o.

FigurZS is a vertialsection through the 'main transmissn; taken ntheline 23;23 in YFig.722. Y Figurei24 is a Sideelevation, partly inlsection Vshowing the wrm gearing for driving one' of the v'servicecable Figure 25 is "a section; fon an enlarged scale, taken on the line25-25 in Fig. 24, shwi ytheY automatic brake 4for one of the Vservicedrums; y i* Y Nvligure 26 is a vertical Ysection ltaken on the linezeg-'Jain rig. 25. l v

Figure 27 is asectib taken oil the line 21-21 in Fig. 25.

Figurep28 is altace *View of the cam plate shown 'inTFigs 2,5l and 27. l

Figure 29 is a section taken 'on the une zes-2 9 in Fig. 28. Y l. v pFigureV 3o is a vertical section, 'with parts r'nitted for'clearness,showing the portion 'c f 'one of the service-cables adjacent to itswinding drum, the idler sleave, and the cable retainer for the i'l'ersheet/e.

Figure 31 is a section on the lille Sal-43E of Fig. 30, on an enlargedscale, showing the Vidler lslilave"and retainer. u

Figure 32 isa vertical section, taken Athe line 32-32 inFig. 31.

.tatie having means -fQr Figure 33 is a vertical section of the swivelbracket for one of the service cable sheaves.

Figure 34 is a rear View of one of the service -cable sheaves swiVelledon the rear of the wrecker, the sheave being shown irlH its; normalposition, as when not inrv use.

Figure 35 is a view of the sheave shown in Fig. 345 but rotated into aposition to permit insertion Qrremova-l of,Y the service cable.

Figure 36 is a side elevation partly in longitudinal section, of one ofthe rear service cable sheaves, and Figure 37 is a section on the line.3T-.31. in Fig. 3 6.

Figure 38. iS, 2i side elevation of the control levers, and theirconnections to the main transmission.

Figure 39- is a detailhorizontal section through oneI of the controllevers, taken on the line 39-39 in Fig. 38.

Figure 40 is a front elevation of portions of the central revers. H l

Fgil'. il is a detail elevation of the connection between the clutch forthe power means ierswing ing one of' the booms and its controllinglever} Figure 42 is a detail liorizontalsection Oi the slack; controllerfor the service cable.

Figure Yi3 is 'a detail vertical Section, on an en larged scale, takenon the line 43--43 in Fig.A 9.

`Figine 44 is a horizontal section o'ii the line +44 in Fig. 4'3. Y l

Figure i5 is a vertical Section on the liner-'l'E-f-#' in Fig. 44. y

Figures 46 and i7 are arielevatio'ii, `and a plan respectively of meaisfor tightening the chain connecting the Outrigger legs.

The inventionras shown in the accompanying drawings i's'adapted to bemounted ciithe chassis of an automotive tricl; of sui able size andpr-oe vided 4With an 'engine for propelling it; 'and haw ing a powertake`=i which vmay 'be of any suit'- able or well known type, forsupplying the power' te loperate various parts of the wreker. 'Since theconstruction of the truck and its power taire eff are well knewn, it isdeemed sufficient. te shew only the longitudinal frame miners i ofl thetruck chassis en which the wrecleris rn'cunted and suitably secured.

The wreckeiicemprise's a ira-nie, generally des-y ignated 2 composed inVthe present instance of pairs or upri'gii'ts '3 at the respective sidesof the frame and vr'comp'o's'ed preferably of channel iron with theflanges of each pair' turned inwardly toward the Acent-.r- 'of'thefra'rnav upper ends of these uprights-are rigidly cnnectecl h'y across member 4 composed .preferably of a pair of chantnel 'irons securedtogether by top and bottom plates 5 and 6, 'and the lower Vends of theupf rights are rigidly 'eecuredto a supporting .streef ture comprisingpreferably a channel iron 'l 'and an I-beam Brigid-1y secured t'oeet;ibytes and bottom plates `9 and l0, thus fore a hase ier the iframe, thebottom yplate exten ing outwardly `from the adiaen-tside of thelongitudinal ,freine member I of the truck chassis. Y

The wrecler asshewn is of the double boom type Ain whichrtheboomsli5-and .ISA are pivotally mounted Vat thel respective sides ci theframe to swing .about verticalaxesy thesebooms 21.6- cording to thepresent invention being each equipped `with .power Ineens 'fer-swngingitlatferf ally t0 lent desir angles.,V means for'- raisingan`16werinsf`th'e eu' eiid4 e'ofianla service 'W- 1 S and unwindns it tofalse al 'lb'vr th'lo and l5@ lflll pulling Jand 'other Operations, aswill be herein-'- after described. Since both booms and theirV as--'sociated partsare of-the same construction, with the exception'thatthey arev mounted 'respectively on the right-hand and left-hand sides ofthe wrecker, detail-illustration and description of one ofthese boomsand its associated parts :will suffice for both, theparts on theleft-handside being shown, and corresponding parts on the right-handside being designated by the same reference numerals but with thedistinguishing suffix A.

shown in the presentinstance, each boom is supported at its inner endron a cap .I6 to which it is pivotally connected 'for raising vandlowering movementsby a horizontal 'pivot pin. I1, the capv I6 beingbolted or'otherwise fixed to the lower portion of a tubular mast I8 thelower end of Ywhich is rotatable on a vertical axis in a bearing I9vsupported vby platek 9 attached to the base members 1 and 8 'of theframe,-as shown in Fig. 5. The upper end of-the mast is' rotatable in abearing 20'which is supported by an extension of the plate 5-atthetop-of the frame. A sheave bracket 2| is fixed to the upper end of themast to rotate' therewith, this bracket carrying sheaves 22 and 23 forthe -boorn supporting cable 24, portions of this cable passing back and`forth between the sheaves- 23 and sheaves 2 5 lrotatable in a yoke'26,and this yoke being vconnected to the outer end of the` boom inanysuitable manner, as for example, by the equalizing sling 21 and sheaves28 carried by the yoke 26, 4as shown and Ydescribed fully in priorcopending application Serial No. 523,314 -led March- 2'7, 1944, now Pat.No. 2,405,578 granted 'August 13, 1946. One end of the boomsupportingeable 24 Vis attached by links 29 -to theyoke 2G), and theother endof ythis cable passes around the sheave 22 and then'idownthrough thetubular masts-to a drum for raising and lowering-'the boom,as will be hereinafter described.- The outer end-of the boom carries asheave 38i around'which theser'vice or hoisting cable 3| passes', thisvcable passing through a guide 32 and usually extending downwardly fromthe outer end of the boom for hoisting and other operations; By xingboth mounted for rotation thereon but is adapted to be coupledt'ol'theshaft 4| by'a clutchfcollar 44 whichis splined on said shaft and hasjaws thereon to engage between complemental jaws on the upper sidel ofthe worm wheel, the clutchv collar being moved into .engaged anddisengaged relation with the worm wheel bya fork 45 which is-'xedto a.shaft 46V rotatable inthe top of the housing"42,"anend .ofi this shaftextending to the exterior of the housing and having an operating arni`41 xed thereon. The clutch connection thus provided between the wormwheel 43 and pinion enables .the boom swinging gear 35 and pinion 40 tobe disconnected from the power drive for swinging of the boomindependently thereof, as manually by pulling the service'cablelaterallyiof fthe outer Yend of the boom. The worm wheel 43. is powerdriven by a worm 48 which meshes therewith and is fixed on a shaft 49which is rotatably'mounted inthe housing 42 preferably byball bearings5B which sustain the radial and axial loads thereon, an end of the wormshaft having a sprocket Vwheel 5I xed thereon for driving-itby'meanshereinafter described; As the anti-friction bearings for theworm shaft offer verylittle resistance to backing-off of the Worm wheel,it is preferable to provide a brake which will lprevent such backing-offwhile the power drive is notin operation, but will not impose any.appreciable resistance uponl the power drive while it is in operation,a friction brake being shown for this purpose in the present instance,which comprises a conical collar 52which is splined on oneend of theshaft 49. byfa key 53 4and is pressed frictionally against .the'adjacentcorrespondingly shaped portion of the worm housing'by a compressed -coilspring 54 which is interposed'between the collar and an adjacent bearing5|). By the. construction.V thus far described,rotation of the sprocketwheel 5I in one orsthe other direction will swing the boom from the boomsupporting cap I6 and the sheave bracket 2l to the mast, said bracketwill be rotated by the mast in unison and conformity with the lateralswinging movements "of the' boom about its vertical -axis `instead ofdepending on the swing of the boom supporting cable for 'rotating it.

The present invention provides novel 4and efficient power means forrotating the boom and its mast laterally into different positions abouta vertical axis, and for controlling such operations. The lower end ofthe mast I8 carries a gear wheel 35 which is keyed or otherwise fixedthereto, this gear being enclosed in a casing 36. A bracket 31 having aguide sheave 38 mounted therein, is provided at the lower'end ofthemast, this bracket having a spindle 31a which projects upwardly into thetubular mast," and a thrust shoulder 31h which bears against thelowerend of the mast, an angle iron bracket31c being attached to' thebracket 31 and-to the frame ofn the wrecker to hold the brackets31 fromrotation 'when the mast is swung about itslvertical axis. The boom cable24 belowthe lower end of the mast passes around the'sheave 38 andextends to the 'drum 39'onto and from vwhich'it is vadapted to be woundand unwound by means hereinafter described.l The mast-swinging gearwheel 35 is kdriven by a' pinion 40 (Figs. 9 and 10) which is fixed o na shaft4l, the latter being journale'din a 'gear housing '42 and havinga worm whee143 its normal position` at. the rear'xof the wrecker toortoward a position where it projects laterally therefrom, or viceversa. Y

Each boom ispreferably so constructed that kit may be lengthened orshortened, as may be desired.'r Preferably andas shown in the presentinstance, veach vboom is composed of telescopic sections 60 and 6I, thesection 60 at the lower end of the boom having a bracket 62 fixedthereto to carry the horizontal pivot l1, and the other section 6|ycarrying the service cable sheave 30, and having the boom supportingsling 21 attachedlto its upper end. The section BI, which slides withinthe sectionil, has a lug E3 fixed thereon, thi-slug being slidable inaslot 64 extending longitudinally of the outer section 60 and havingV acable 65 attached thereto, this cable extending around a sheave 66rotatable in abracket 61 xed .on the outer section BU and having a loop8B or other attaching device on itsfree end. Engagement of the lug 63 inthe slot 64- -prevents rotation of the innerv section within theoutersection of the boom. By this arrangement a pull applied to the cable 65will cause the innerboom section El to be pulled out for' extended fromthe outer section 60. Such an operation also -serves to automaticallyswing the boom upwardly,v since the boom `cable 24 connected t0 theupper end of the boom section'l acts as a radial tie of fixed lengthbetween the upper end of the section 6l and the topv of the mast, and asthe length of the boom is'increased by extending ofthe section 8|,.theupper end of the boom is compelled to rise, and thusswing 9 plate -5 bya baseplate |04 having a downwardly extending cylindrical portion |05which is hollow for the passage of the service ca-ble, and is mountedrotatably in a bearingl |06 supported in the top cross member 4 of theframe. The vertical axis of the sheave bracket r95 is preferably locatedopposite to the apex of the angle through which the respectivev boom'swings laterally from one extreme position `to the other, and in avertical plane which substantially bisects said angle, in order that aloads'uspended by the service cable from the outer end of the boom willbe at the same height at the end of the swing as it was at thecommencement of the swing, as the boom swings from a position Vat theside to a position at the vrear of the wrecker, or vice versa. Y' lEachidler sheave 9| islpreferably provided with a retainer for preventingdislocation'of the serv'- ice cable therefrom while this cable is slack,but permits disengagement of this cable from this sheave when such isdesired'. This retainer,` as shown in the present instance, comprises ashaft IIO '(Figs. 30, 31 and 32) which extends between the pair ofuprights 3, and has its ends mounted to rotate and also move axially inholes in said uprights. A sleeve III is fixed on this shaft and has .arib or rail I I2 along one side thereof which projects to an extentwhich will bring it into close proximity to the peripheral flanges ofthe sheave 9| when the shaft `||0 is rotated into one position, as shownin Fig. 30 and by the full lines in Figs. 31 and 32, thereby retainingthe service cable in the groove of this sheeve, and said rib'or railwill be retracted from the sheave 9| sufficiently to permit removal ofthe servicef cable from the groove thereof when the shaft is rotatedthrough a `sufficient angle, as indicated for example by the dottedlines in Fig. 32. The

ribor rail ||2 is preferably provided with a prof jection I|3 at one endwhich is engageable in a hole I I4 inthe adjacent upright 3 to lock therib |I2 in cableretaining position, and said projectionv is preferablyheld in its hole by a'compressed coil spring I |'5which encircles theshaft II and bears at its ends respectively against the sleeve v| l Iand the'adjacentupright 3. `Y While the retainer is rotated into aposition to permit placing of the service cable in the grooveof thesheave 3 I, or re` moval of saidcable therefrom, the projection I |3will be pressed by the spring I I5 lagainst the adjacent uprightV 3,thereby holding the retainer in suchv position. v f 'i `Each servicecable is adapted to be wound upon and unwound from the drum 92 toperform the hoisting, pulling'and other operations. This drum is mountedrotatably on a sleeve or hollow shaft which spans the' space between andis secured ina pair of triangular plates I2I between which the drum isaccommodated, these plates having vertical edges which are bolted,`welded or otherwise securely fixed to the respective pair of uprights,as shown in Fig. 31, the lower or horizontal edges of these plates beingbolted or otherwise firmly fixed to the truck chassis on which thewrecker isr mounted. These plates thus provide means for rigidlysupportingithe wrecker frame and 'its parts on the truck chassis, itbeing understood that a pair of these triangular plates are provided ateach'side of the wreckerl and are fixed to the pairs-of uprights 3 atthe-respective sides, and house the service drums at the respectivesidesof the wrecker. Casing sections |22 andv I23Vare preferably attached tothese triangular plates to enclosethe upperv andlower sidesaof therespective service cable drum and'its associated parts to protect themfrom the weather andforl safety purposes. The sleeve |20 also supportsthe boom cable drum 39 which is rotatably mounted thereon, this drumbeing driven by a plate |25 which is fixed'thereto and to the outer endof a shaft |26 which is journaled in a bearing |21 supported within thesleeve |20, and said shaft is driven through a coupling |28 by poweroperating'mechanism which will be hereinafter described.

Each service cable drum is driven through a gear llwhich is formedintegrally with or at'- tached to one of its flanges. The presentinvention provides novel means whereby each service drum-may be rotatedrapidly,- as for example, to wind the respective service cablequicklywhile slack orfunder a'relatively light load, and to be driven moreslowly and with greater power while under a relatively heavy load. Suchtwo-speed drive for eachv service drumyasvshown clearly in Figs. 12 to18 inclusive, comprises a main driving pinion I3! which also meshesconstantly with the gear |30. The main pinion isrnounted rotatably on ashaft |33v journaled in bearings I 34 and |35 fixed in the respectivepair of triangular plates, this shaft beingV provided with splines |35on which a clutch collar |31 is'slidable, this clutch collar beingtherebydriven from said shaft and having clutch jaws |38 thereonwhichare engageable withor disengageable from complemental jawson theadjacent side of the pinion I3I whereby the latter may be coupled to anduncoupled from the shaft |33. The shaft I33Ais provided at one end witha coupling |39`for connecting it to its power. operating means, to be`hereinafter described. A relatively large gear wheel |40 is xed to theother end of the shaft |33, and this gear wheel meshes with a relativelysmall pinion |4| mounted ona shaft I 42, whereby the latter may bedriven from the shaft |33. A friction drive is preferably employedbetween the shafts |33 and |42 whereby the drive of the shaft |42 willbe relieved or in'- terrupted automatically when'the load on the servicecable exceeds a given amount. For this purpose, the pinion I4I is formedon'or fixed to the yhubof a friction drum I43which is mounted rotatablyon the shaft |42 and housesa pairv of friction shoes |44 arranged tofrictionally engage its interior surface under a pressure which isregulated by screws |45 which connect the shoes and are adjustable torelatively expander contract the shoes. These shoes drive the shaft |42through a cross arm |45 which is xed to said shaft, the lends of thisarm engaging in sockets |41 in the brake shoes.

Theshaft |42'hasca gear |50 mountedrotatably thereon and adapted to becoupled thereto by a clutch collar |5| which isslidable on splines v|52on said shaft which splines drive said collar.v The clutch collar |5|has clutch jaws |53 which are engageable with and disengageablefromrcomple- I mental clutch jaws provided on the adjacent face of thegear |50. `The gear |32 is mounted on;a shaft |54, and this shaft andtheshaft'l42 are journaled in bearings mounted in the triangular plates|2I. Sincev the shaft |42 will be driven by the gear. |40 and pinionYI4! in a direction reverse to the direction' of rotation of the shaft|33, the pinion |32 is interposed as an idler gear between the gear |53Vandthe drum gear |30, so that the lmain pinion I3I 'and also the higherspeed or overdrive pinion |32 will both drive the'drum in the samedirection for a given direction of rotation of the drive shaft |33.

Each main pinion I3| andoverdrive-gear |50

